/*
 * Copyright 2010 - 2011, The PLDesktop Development Team
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#ifndef PLSPINLOCK_H
#define PLSPINLOCK_H

#include <lib/atomic.h>
#include <stddef.h>

/**
 * Implementation for a spinlock implementation.
 */
class Spinlock {
public:
	/**
	 * Constructor.
	 *
	 * @param bLocked Is it locked.
	 * @param bAvoidTracking Avoid tracking.
	 */
	Spinlock(bool bLocked = false, bool bAvoidTracking = false);
	/**
	 * acquire.
	 */
	void acquire();
	/**
	 * release.
	 */
	void release();
	/**
	 * acquired.
	 *
	 * @return is acquired.
	 */
	inline bool acquired() {
		return !m_atom;
	}
private:
	volatile bool m_bInterrupts;
	Atomic<bool> m_atom;
	uintptr_t m_Ra;
	bool m_bAvoidTracking;
	uint32_t m_Magic;
};

#endif
